A coal grinding distribution valve

Abstract

A coal grinding distribution valve, a sealing ring connection is provided between a base block and a direction control block, the direction control block is provided with a transverse movable slide valve, one end of the movable slide valve is connected to a screw plug through a gasket, and the other end is connected to a connecting rod through a pin, the connecting rod contacts the direction control block through the gasket, the direction control block is provided with three longitudinal pipelines connected to the movable slide valve, one end of a middle pipeline is provided with a screw plug, and the other end is connected to the space where a swing rod is located, and the pipelines on both sides are provided with port a and port b, and are connected to a rack slide valve; the middle of the rack slide valve is meshed with a fan-shaped wheel shaft gear, one end of the fan-shaped wheel shaft is connected to a spring, and the other end is connected to a sealing piston through a sealing ring, the fan-shaped wheel shaft extends out of the direction control block to connect the swing rod, and the swing rod is connected to a small shaft through a top screw, so that the flow rate and flow direction of the coal powder can be manually intervened in the control during the transportation process, the flow rate and flow direction of the coal powder can be manually controlled, the control operation is simple and convenient, and the valve body structure has high strength, so that the distribution ratio of the coal powder is more accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a coal grinding distribution valve. Background Art

[0002] As a common chemical raw material, coal powder is mainly used in the fields of electricity, metal smelting, cement chemical industry, etc. At present, the problems that need to be urgently solved in the development of the chemical industry are energy saving, consumption reduction, environmental protection, and improving labor productivity, and taking the path of sustainable development. Among them, environmental protection issues have become the focus of global attention. If the coal powder is not burned fully during the combustion process, a large amount of nitrogen oxides will be produced, which will cause great pollution to the environment. The key to reducing nitrogen oxides lies in the combustion control technology in the furnace, so that the combustion process of coal powder can be carried out more fully. However, due to the fluidity of coal powder, the coal powder particles are very fine, and the unit mass of coal powder has a large surface area, and the surface can absorb a large amount of air, making it fluid. This characteristic makes coal powder easy to transport by pneumatic force. The disadvantage is that it is easy to form coal powder self-flow, and it is easy to leak powder when the equipment is not tight, so the control requirements for the flow rate and flow direction of coal powder are relatively high.

[0003] The valve body in the middle of the traditional coal grinding distribution valve is connected by a steel pipe. This valve body structure has the following shortcomings: the steel pipe connection makes it difficult to manually control the flow and direction of coal powder, the pipeline sealing is difficult to meet the requirements, the steel pipe is not strong, easy to wear, and has a short life. The steel pipe has many sizes and specifications and cannot meet the standardization requirements. Therefore, the optimization of the structure of the coal grinding distribution valve plays a great role in improving the efficiency of coal powder distribution. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a pulverized coal distribution valve, which allows manual intervention in the control of the flow rate and flow direction of the pulverized coal during transportation, thereby making the distribution ratio of the pulverized coal more accurate.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0006] A coal grinding distribution valve comprises a basic block and a direction control block. A sealing ring is arranged between the basic block and the direction control block, and the two blocks are fixed by screws and gaskets. The direction control block is provided with a transverse movable slide valve. One end of the movable slide valve is connected to a screw plug through a gasket, and the other end is connected to a connecting rod through a pin. The connecting rod contacts the direction control block through a gasket. The connecting rod is connected to the screw plug through a sealing ring. An oil seal is arranged between the screw plug and the clamping nut. The direction control block is provided with three longitudinal pipelines connected to the movable slide valve. One end of the middle pipeline is provided with a screw plug, and the other end is connected to the space where the swing arm is located. The pipelines on both sides are provided with a screw plug. There are port a and port b, which are connected to the rack slide valve; the pipeline structures at both ends of the rack slide valve are symmetrical, and a screw plug is provided on the connected longitudinal pipeline, and one end is connected to the joint through a gasket; the middle of the rack slide valve is meshed with the fan-shaped wheel shaft gear, one end of the fan-shaped wheel shaft is connected to a spring, and the other end is connected to a sealing piston through a sealing ring, and the sealing piston is connected to a rocker rod at the direction control block through a retaining ring and a sealing ring, and is fixed by a cotter pin and a nut; the rocker rod is connected to the small shaft through a top screw, and a push pin is provided on the direction control block next to the small shaft, and a plug, rivet, nameplate and nameplate are provided under the base block to store transportation.

[0007] A sealing ring is arranged between the connecting rod and the pin.

[0008] The gasket and the joint are sealed with glue.

[0009] The material of the gasket is T2 copper.

[0010] The beneficial effects of the present invention are:

[0011] The flow rate and direction of pulverized coal can be controlled artificially, the control operation is simple and convenient, the valve body structure is strong, and the valve body surface is plated to make the valve body more wear-resistant during use, extend its service life and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a cross-sectional view of the present invention;

[0013] Fig. 2 is a cross-sectional view of the present invention;

[0014] FIG3 is a schematic structural diagram of the present invention;

[0015] Fig. 4 is a schematic structural diagram of the present invention;

[0016] FIG5 is a schematic diagram of the structure of the present invention; FIG6 is a schematic diagram of the working principle of the present invention.

[0017] Among them, 1 is a storage and transportation plug; 2 is a rivet; 3 is a nameplate; 4 is a nameplate; 5 is a fixing device; 6 is a base; 7 is a sealing ring; 8 is a screw plug; 9 is a joint; 10 is a gasket; 11 is a rack slide valve; 12 is a screw plug; 13 is a gasket; 14 is a movable slide valve; 15 is a direction control block; 16 is a screw plug; 17 is a pin; 18 is a connecting rod; 19 is a screw plug; 20 is a sealing ring; 21 is an oil seal; 22 is a locking nut; 23 is a cotter pin; 24 is a nut; 25 is a rocker rod; 26 is a sealing piston; 27 is a retaining ring; 28 is a sealing ring; 29 is a sealing ring; 30 is a fan-shaped wheel shaft; 31 is a spring; 32 is a screw; 33 is a gasket; 34 is a top screw; 35 is a small shaft; 36 is a taper pin. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings.

[0019] like Figure 1 , 2 As shown in Figures 3, 4 and 5, a pulverized coal distribution valve comprises a base block 6 and a direction control block 15. A sealing ring A7 is arranged between the base block 6 and the direction control block 15, and the base block 6 and the direction control block 15 are fixed by screws 32 and gaskets C33. The direction control block 15 is provided with a transverse movable slide valve 14. One end of the movable slide valve 14 is connected to a screw plug C12 through a gasket A13, and the other end is connected to a connecting rod 18 through a pin 17. The connecting rod 18 contacts the direction control block 15 through a gasket. The connecting rod 18 is connected to a screw plug D19 through a sealing ring B20. An oil seal 21 is arranged between the screw plug D19 and the clamping nut 22. The direction control block 15 is provided with three longitudinal pipelines connected to the movable slide valve 14. One end of the middle pipeline is provided with a screw plug B16, and the other end is connected to the space where the swing rod 26 is located. The pipelines on both sides are connected to the space where the swing rod 26 is located. A port a and a port b are provided, and the rack slide valve 11 is connected; the pipeline structures at both ends of the rack slide valve 11 are symmetrical, and the longitudinal pipeline connected on the rack slide valve 11 is provided with a screw plug A8, and the left end is connected to the joint 9 through a gasket B10; the middle of the rack slide valve 11 is meshed with the fan-shaped wheel shaft 30, one end of the fan-shaped wheel shaft 30 is connected to the spring 31, and the other end is connected to the sealing piston 26 through a sealing ring D29, and the sealing piston 26 is connected to the swing rod 25 through a retaining ring 27 and a sealing ring C28. The fan-shaped wheel shaft 30 extends out of the direction control block 15 and is connected to the rocker arm 25, which is fixed by a cotter pin 24 and a nut 25; the rocker arm 25 is connected to the small shaft 35 through a top screw 34, and the direction control block 15 is provided with a push pin 36 beside the small shaft 35, and a storage and transportation plug 1, a rivet 2, a label A3, and a label B4 are provided below the base block 6.

[0020] A sealing ring B20 is provided between the connecting rod 19 and the pin 18 .

[0021] The gasket B10 and the joint 9 are sealed with glue.

[0022] The material of the gasket B10 is T2 copper.

[0023] The pulverized coal enters from the two middle feed ports of the coal grinding distribution valve, enters the valve body through the channel connected to the valve seat inlet, and then enters the passage of the lower sliding valve through the capillary in the direction control block. The fan-shaped wheel shaft is rotated by the rocker rod to control the left and right movement of the lower sliding valve. The flow rate and direction of the pulverized coal are further controlled by controlling the cross-sectional area of ​​the passage of the direction control block. The pulverized coal enters the upper sliding valve through the channel connected to the lower sliding valve, and the position of the upper sliding valve is controlled by the connecting rod, thereby controlling the flow rate and direction of the pulverized coal. The pulverized coal is interchanged through channels a and b, and then discharged from the discharge port through the channel connected to the lower sliding valve.

[0024] The small shaft 35 is fixed to the rocker arm 25 by means of the top screw 34, so as to facilitate manual control of the rotation of the rocker arm; and the rocker arm is fixed to the fan-shaped wheel shaft 30 by means of the nut 24; the sealing piston 26, the retaining ring 27, and the sealing rings C28 and 29 play a sealing role; the spring 31 is used to ensure the installation position of the fan-shaped wheel shaft; the screw 33 and the gasket 32 ​​are used to connect the valve body and the valve seat.

[0025] The screw plug C12 and the gasket A13 seal the upper slideway. The material of the gasket is T2 copper, which is corrosion-resistant. The movable slide valve 14 is connected to the connecting rod 18 through the pin 17. The screw plug D19, the gasket A13, the sealing ring B20 and the oil seal 21 seal the upper slideway. The clamping nut 22 fixes the connecting rod.

[0026] The gasket B10 and the joint 9 are coated with sealing glue to seal the lower slideway; the fan-shaped wheel shaft controls the position of the rack slide valve 11 through the gear pair; the screw plug B16 seals, and the lubricating oil lubricates the moving slide valve, the fan-shaped wheel shaft, and the rack slide valve through its sealed channel.

[0027] All process holes except the inlet and outlet are sealed with plugs.

[0028] The base block 6 can be connected to other equipment via the fixing device 5 .

[0029] Working principle of the present invention:

[0030] The working principle of the coal grinding distribution valve is mainly described in the following four cases:

[0031] Case 1 (upper slide valve moves to the left, lower slide valve moves to the right)

[0032] Since the lower slide valve moves to the right end, the left passage of the coal powder in the direction control block is in an open state and is directly connected to the passage of the upper slide valve; and since the upper slide valve moves to the left end, the cross-sectional area of ​​the passage connected to the lower slide valve is reduced, the coal powder flow rate is reduced, and it flows out from port a, then enters port b, and flows out directly through the left discharge port connected to the lower slide valve.

[0033] Case 2 (both upper and lower slide valves are moved to the left)

[0034] Since the lower sliding valves are all moved to the left end, the left passage of the coal powder in the direction control block is in a closed state; and since the upper sliding valves are also moved to the left end, the right passage of the coal powder in the direction control block is also in a closed state. At this time, the coal powder in the coal grinding distribution valve is in a non-flowing state.

[0035] Case 3 (both upper and lower slide valves move to the right)

[0036] Since the upper and lower sliding valves are both moved to the right end, the right feed passage of the coal powder in the direction control block is in an open state and is directly connected to the passage of the upper sliding valve. The cross-sectional area of ​​the channel connected to the lower sliding valve is reduced, and the coal powder flow rate is reduced. The coal powder can flow out directly from port b, then enter port a, and flow out directly through the right discharge port connected to the lower sliding valve.

[0037] Case 4 (upper slide valve moves to the right end, lower slide valve moves to the left end)

[0038] Since the lower slide valve moves to the left end, the right feed passage of the pulverized coal in the direction control block is in an open state and is directly connected to the passage of the upper slide valve. The lower slide valve moves to the left end. At this time, the flow rate of the pulverized coal in the direction control block is the largest. The pulverized coal flows out through port b, then enters port a, and flows out directly from the right discharge port connected to the lower slide valve.

[0039] In summary, the pulverized coal distribution valve controls the left and right movement of the upper and lower slide valves, thereby controlling the flow direction and flow rate of the pulverized coal in the valve body.

Claims

1. A coal grinding distribution valve, comprising a base block (6) and a direction control block (15), characterized in that: A sealing ring A (7) is provided between the base block (6) and the direction control block (15), and the base block (6) and the direction control block (15) are fixed by screws (32) and gaskets C (33). The direction control block (15) is provided with a transverse movable slide valve (14). One end of the movable slide valve (14) is connected to the screw plug C (12) through the gasket A (13), and the other end is connected to the connecting rod (18) through the pin (17). The connecting rod (18) contacts the direction control block (15) through the gasket. The connecting rod (18) is connected to the direction control block (15) through the sealing ring. B (20) is connected to the screw plug D (19), and an oil seal (21) is provided between the screw plug D (19) and the clamping nut (22); the direction control block (15) is provided with three longitudinal pipelines connected to the movable slide valve (14), one end of the middle pipeline is provided with a screw plug B (16), and the other end is connected to the space where the swing rod is located, and the pipelines on both sides are provided with ports a and b, and are connected to the rack slide valve (11); the pipeline structures at both ends of the rack slide valve (11) are symmetrical, and the longitudinal pipeline connected on the rack slide valve (11) The passage is provided with a screw plug A (8), and the left end is connected to the joint (9) through a gasket B (10); the rack slide valve (11) is meshed with the gear of the sector wheel shaft (30); one end of the sector wheel shaft (30) is connected to the spring (31), and the other end is connected to the sealing piston (26) through a sealing ring D (29); the sealing piston (26) passes through the retaining ring (27) and the sealing ring C (28); the sector wheel shaft (30) extends out of the direction control block (15) and is connected to the rocker (25), through the opening The sway rod (25) is connected to the small shaft (35) through a top screw (34); a push pin (36) is provided on the direction control block (15) beside the small shaft (35); a storage transport plug (1), a rivet (2), a label A (3), and a label B (4) are provided below the base block (6); wherein the coal mill distribution valve has two feed ports in the middle, and the coal mill distribution valve has a left discharge port and a right discharge port, and the left discharge port and the right discharge port are both connected to the rack slide valve, and the a port and the b port are connected to each other.

2. A coal grinding distribution valve according to claim 1, characterized in that: A sealing ring B (20) is provided between the connecting rod and the pin.

3. A coal grinding distribution valve according to claim 1, characterized in that: The gasket B (10) and the joint (9) are sealed with glue.

4. A coal grinding distribution valve according to claim 1, characterized in that: The material of the gasket B (10) is T2 copper.

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